Drying apparatus.



K. -WEISS.

DRYING APPARATUS. APPLICATION I'ILED'JUNE 1, 1910.

991,679. Patented May 9, 1911.

vl l I I B s I I A i I I 1 I Q i i 5 b: E I! 1 I 1 I 1 II rue NORRISPETER; cm, WASHINGTON. n. c

- ran err DRYING APPARATUS.

Specification of Letters Patent.

Patented May 9, 1911.

Application filed June 1, 1910. Serial No. 564,368.

To all whom it may concern.

Be it known that I, KARL 'Wnrss, a subject of the German Empire,residing at Meissen, Germany, have invented certain new and usefulImprovements in Drying Apparatus; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompanying drawings, and toletters or figures of reference marked thereon, which form a part ofthis specification.

This invention relates to a trough-shaped drying apparatus, comprising arotatable perforated body, used for drying potatoes, adhesive masses andthe like, the heating medium, 6. 9., hot air or furnace gases, beingintroduced into the inner chamber and the material to be dried beingdistributed over the outer periphery of the drum.

The invention consists in arranging an agitator or mixing device overthe perforated body which constantly disintegrates and uniformlydistributes the material over the perforated body and effectivelyprevents the perforations being stopped up, as was frequently the caseheretofore, by material settling firmly on the perforated body.

One illustrative embodiment of the invention is represented by way ofexample in the accompanying drawing, wherein:

Figure 1 is a vertical, longitudinal section and Fig. 2 a verticaltransverse section showing the drying apparatus.

Referring to the drawing, a revoluble cylinder 6 provided with smallperforations is arranged in the stationary through k which is covered bya top-piece or cover a and, if desired, can be heated specially, saidcylinder being provided on its periphery with blades 0 arranged atintervals, their broad ends passing in close proximity to the trough isto effectually scrape from the trough any adhering material. Theseblades are placed close together there being only suflicient space forthe passage of rotating arms 6.

A rotatable shaft (Z which is provided with arms 6 moving between theblades 0 and whose speed of rotation is greater than that of thecylinder 6, passes through the top chamber inclosed by the cover a. Thearms 6 of this agitator or stirrer are placed slantwise or provided withbent lateral edges in order to feed the material along the periphery ofthe drum.

The wet material is supplied at one end of the drying apparatuspreferably by one or more screw conveyers f at a constant speed. Theheating medium is supplied at the opposite end of the drying apparatus,in the illustrative embodiment through the hollow journals Z) of theperforated cylinder 6, hot air or furnace gases serving as the heatingmedium which is blown by a fan into the rotating cylinder 6. The driedmaterial leaves the apparatus through the outlet 9 provided in thetrough, it being thrown out by the blades of the rotating cylinder whichare opposite the outlet 9, while the air or gases saturated with waterissue through the outlet h.

hen the cylinder Z) rotates, the blades arranged on the peripherythereof lift the material to the top part of the drying apparatus whereit is distributed by the arms of the shaft (Z over the periphery of thecylinder and is consequently rapidly dried. In consequence of theexterior periphery of the perforated cylinder being constantlyinfluenced by the arms of the agitator, the material to be dried isprevented from becoming fixed on the drum, so that the stoppage of theperforations which frequently occurred heretofore, particularly in thecase of certain materials, is efiectively prevented.

I claim:

1. In a drying apparatus of the character described the combination witha trough, of a perforated cylinder, broad blades mounted on the cylinderwhose ends pass in close proximity to the trough to scrape adheringmaterial therefrom, and an agitator rotatably mounted over the cylinderand having arms passing between said blades to scrape the cylinder andprogress the material.

2. In a drying apparatus of the character described the combination witha trough having an inlet and an outlet, and a cover having outlets forthe material treated and the heating medium of a perforated cylinder,closely arranged blades on the periphery thereof whose ends pass inclose proximity to the trough wall to scrape any material therefrom, andan agitator revoluble 'in said cover and having arms movable between theblades in close proximity thereto and to the cylinder to scrape thecylinder and progress the material.

3. In a drying apparatus the combination with a trough, of a fora-minouscylinder mounted therein having an enlarged hollow trunnion for theadmission of a drying medium, cover having an outlet at one side for thematerial treated and for the drying medium at its top, closely arrangedspaced blades on the cylinder Whose ends pass in close proximity to thetrough, Wall, and an agitator in the cover between the outlet for thedrying medium and one end of the cover having agitator arms adapted topass between the blades and in close proximity to the cylinder to scrapethe cylinder and progress the material toward its outlet.

In testimony that I claim the foregoing as my invention, I have signedmy name in presence of tWo subscribing Witnesses.

KARL WEISS.

Witnesses:

E. ERNST RICHTER, KARL LADISOH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Fatents, Washington, D. G.

